<template>
  <div>
    <div id="slider" class="mui-slider">
      <!-- 顶部滑动条mui-->
      <div
        id="sliderSegmentedControl"
        class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted"
      >
        <div class="mui-scroll">
          <a
            :class="['mui-control-item', item.id == 0 ? 'mui-active' : '']"
            v-for="item in cates"
            :key="item.id"
            >{{ item.title }}</a
          >
        </div>
      </div>
      <!--图片懒加载组件mint-->
      <ul class="photo-list">
        <router-link
          v-for="item in list"
          :key="item.id"
          :to="'/home/photoinfo/' + item.id"
          tag="li"
        >
          <img v-lazy="item.img_url" alt="" />
          <div class="info">
            <h1 class="info-title">{{ item.title }}</h1>
            <div class="info-body">{{ item.zhaiyao }}</div>
          </div>
        </router-link>
      </ul>
    </div>
  </div>
</template>
<script>
  import mui from '../../lib/mui/js/mui.min.js' //导入mui的js文件，用户顶部滑动条的滑动，还需调用组件
  export default {
    data() {
      return {
        cates: [], //栏目名称数组
        list: [], //图片列表数组
      }
    },
    created() {
      this.getAllCategory()
      this.getPhotoListByCateId()
    },
    mounted() {
      //当组件中的dom结构被渲染好并放到页面中后，会执行这个钩子函数
      mui('.mui-scroll-wrapper').scroll({
        deceleration: 0.0005, //flick减速系数，系数越大，古代弄越慢，默认值0.0006
      })
    },
    methods: {
      getAllCategory() {
        //获取所有的图片分类
        this.$axios.get('./json/imgcategory.json').then((reslut) => {
          if (reslut.data.status === 0) {
            reslut.data.message.unshift({ title: '全部', id: 0 })
            this.cates = reslut.data.message
          }
        })
      },
      getPhotoListByCateId() {
        //获取所有图片信息
        this.$axios.get('./json/imglist.json').then((result) => {
          if (result.data.status === 0) {
            this.list = result.data.message
          }
        })
      },
    },
  }
</script>
<style lang="scss" scoped>
  * {
    touch-action: pan-y; /*用于消除滑动警告，启用单指垂直平移手势 */
  }
  .mui-slider {
    position: static;
  }
  .photo-list {
    padding: 0 10px;
    margin: 0;
    list-style: none;
    li {
      background-color: #ccc;
      text-align: center;
      margin-bottom: 10px;
      position: relative;
      box-shadow: 0 0 6px #999;
      img[lazy='loading'] {
        width: 40px;
        height: 300px;
        margin: auto;
      }
      img[lazy='loaded'] {
        width: 100%;
        vertical-align: middle;
      }
      .info {
        color: #fff;
        text-align: left;
        position: absolute;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.4);
        width: 100%;
        max-height: 84px;
        .info-title {
          font-size: 14px;
        }
        .info-body {
          font-size: 12px;
        }
      }
    }
  }
</style>